Here is my weekly weather quiz question for the last time. What is “ Astronomical Dawn?”Here is the correct answer. Astronomical Dawn is the time at which the sun is 18 degrees below the horizon in the morning. Astronomical dawn is that point in time at which the sun starts lightening the sky. Prior to this time during the morning, the sky is completely dark. I’ll have a new weekly weather quiz question for you Monday.  The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

________________

 

A short lived Upper Level High Pressure Ridge (Shaded “Arch” shape with blue arrows) dried us out for today, but an Upper Level Low Pressure Trough (Shaded “U” shape with blue arrows) will take over returning the chance of showers today. The graphics for days 1-3 show the frontal system bringing rain chances today and the next front approaching Monday. The graphics for days 3-7 show frontal systems moving into the Pacific Northwest Tuesday night and gain Thursday.

Note: Willamette Pass Ski is officially closed for the season and Hoodoo is open this weekend and then closed for the season. Check out their websites or give them a call.

 

________________

 

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 6 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 7 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 1 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

________________

Home Wood Heating Advisory:

Eugene-Springfield: GREEN – Burning is Allowed.

Oakridge: GREEN – Burning is Allowed.

*Note: Pellet stoves may be used anytime if they produce no visible emissions.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

________________

Advisories:

• Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

________________

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Partly cloudy with a slight (20%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers late tonight,
• Mostly cloudy with showers likely (70%) Sunday (0.25 in. of rain possible), a good (50%) chance of evening rain, rain late Sunday night (0.50 in. of rain possible) and Monday (0.50 in. of rain possible), showers at night (under 0.10 in. of rain possible),
• Mostly cloudy with rain Tuesday, then showers likely (70%) Tuesday night.
• lows 40-42 highs near 56.
• Mostly cloudy with showers likely (70%) Wednesday, a good (50%) chance of showers Wednesday night,
• A good (50%) chance of rain and a bit warmer Thursday, showers likely (70%) Thursday night,
• Cloudy with a good (50%) chance of showers and a bit warmer Friday, partly cloudy with a slight (20%) chance of showers at night,
• Then just partly cloudy and a bit warmer Saturday.
• highs 55-62 lows near 42. (seasonal averages high 62 low 40)

_____

 

Eugene-Springfield Pollen Count:

Grass………. Low (3)

Trees………. Moderate (38)

Last Counted: 4/21/17

Data Courtesy of Oregon Allergy Associates.

_________________

 

Forecast for Roseburg:

• Mostly cloudy with isolated showers tonight,
• Mostly cloudy with increasing AM showers, scattered showers and a bit cooler Sunday afternoon (0.10 in. of rain possible, snow level 3,500 ft.), a (30%) chance of evening rain, rain late Sunday night (0.25 in. of rain possible, snow level 3,500 ft.),
• Mostly cloudy and with rain Monday (0.50 in. of rain possible), cloudy with evening showers, a good (50%) chance of showers late Monday night (0.25 in. of rain possible),
• Rain and a bit warmer Tuesday, then showers likely (70%) at night.
• lows 46-48 highs near 58.
• Cloudy with a good (50%) chance of showers Wednesday, mostly cloudy with a good (50%) chance of showers and a bit cooler Wednesday night through Friday, mostly cloudy Friday night,
• Then partly cloudy Saturday.
• highs 58-68 lows 45-43. (seasonal averages high 64 low 43)

 

_____________________

 

Forecast for The South Central Oregon Coast Including Coos Bay and North Bend:

• Mostly cloudy with a (40%) chance of scattered showers late tonight (under 0.10 in. of rain possible),
• Cloudy with increasing AM coastal showers and scattered afternoon coastal showers likely (70%) and a bit cooler while scattered inland showers likely (70%) Sunday (0.25 in. of rain possible), coastal rain at night while evening inland rain likely (70%) and inland rain late Sunday night (0.50 in. of rain possible),
• Mostly cloudy with rain Monday (0.75 in. of rain possible), evening showers, showers likely (70%) late at night (under 0.10 in. of rain possible),
• Mostly cloudy with rain Tuesday, then showers likely (60%) Tuesday night.
• lows near 48 highs near 55.
• Mostly cloudy with showers likely (60%) and a bit cooler Wednesday, mostly cloudy with a good (50%) chance of showers and a bit warmer Wednesday night through Friday, then partly cloudy Friday night and Saturday (a bit warmer).
• highs 54-62 lows near 46. (seasonal averages high 56 low 44)

 

________________

Forecast for the Cascades in Lane County:

• Mostly cloudy with a (30%) chance of evening rain and snow showers, a slight (20%) chance of rain and snow showers and colder late tonight,
• Mostly cloudy with a (30%) chance of AM rain and snow showers, rain and snow showers likely (70%) and a bit cooler Sunday afternoon (0.25 in. of rain possible, 2 in. of snow possible), rain and snow at night (0.50 in. of rain possible, 3-6 in. of snow possible),
• Mostly cloudy with rain and snow Monday, rain and snow showers Monday night,
• Mostly cloudy with rain and snow and a bit warmer Tuesday, then rain and snow showers Tuesday night.
• snow level 5,500 ft. falling to 4,500 ft. late tonight, 3,500 ft. rising to 4,500 ft. Sunday, 4,500 ft. Sunday night, 4,000 ft. Monday, 3,500 ft. Monday night, 4,000 ft. Tuesday, then 4,500 ft. Tuesday night.
• lows 30-32 highs 40-42.
• Mostly cloudy with rain and snow likely (70%) and a bit warmer Thursday, rain and snow showers likely (70%) and a bit warmer Thursday night and Friday, a slight (20%) chance of rain and snow showers Friday night,
• Then partly cloudy and a bit warmer Saturday.
• snow level 4,000 ft. Wednesday, 4,500 ft. Wednesday night, 4,000 ft. Thursday, 4,500 ft. Thursday night,  4,500 ft. Friday, 4,000 ft. Friday night, then free air freezing level 5,000 ft. Saturday.
• highs 39-49 lows 28-24.

________________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________